Donald Trump's Lashes Out as He Loses 12 Points in Nationwide Poll

The Republican presidential candidate intensifies claims that the election is "rigged" against him.
3:03 | 10/16/16

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Transcript for Donald Trump's Lashes Out as He Loses 12 Points in Nationwide Poll
We begin tonight with the 23-day sprint to election day. And Donald Trump sharpening a new line of attack. A brand-new ABC news/washington post poll showing Hillary Clinton with a four-point advantage over trump, but that's within the margin of error. The poll also shows enthusiasm for trump fading, and two-thirds of registered voters rejecting his claim that he did not make unwanted sexual advances to women. Trump firing off a tweet storm with his latest attack that the election is rigged. And Clinton's campaign facing some tough questions. After a ninth day of wikileaks e-mails. More on that in a moment. But we begin with Mary Bruce, covering the trump campaign. Reporter: Tonight, Donald Trump is lashing out. Saying the election can't be trusted. The election is being rigged by corrupt media pushing false allegations and outright lies in an effort to elect Hillary Clinton as president. Reporter: Without evidence, trump is increasingly saying he's the victim of a conspiracy. In less than 48 hours, trump claiming a rigged election more than 20 times, even suggesting "Saturday night live" is in on it. Tweeting, time to retire, boring and unfunny show. Alec Baldwin portrayal stinks. Media rigging election. Some trump supporters are already bracing for a fight. I'll do everything in my power to take her out of power. Reporter: Trump's running mate trying to reassure the public. I'm ready for a revolution, because we can't have her in. Reporter: Trump's running mate tried to reassure the public. But the Clinton campaign says trump is using scorched Earth scare tactics. He knows he's losing. Reporter: Trump is ramping up his attacks as more women accuse him of sexual misconduct. Kathy heller saying that trump kissed her without consent at a mother's day event. Trump's campaign denies the allegation, saying it would have been the talk of palm beach for the past two decades. False stories, all made up. Lies. Lies. Reporter: Trump going after his accusers, like Jessica Leeds. Who says in the '80s, trump groped her for 15 minutes on a plane. A claim he's mocked. 15 minutes? With the ladies in this place, it would be one second, and it would be smack. 15 minutes. Reporter: And with the final debate just three days away, trump has a new unfounded theory. Clinton may be on drugs. I think we should take a drug test prior to the debate. I do. Because I don't know what's going on with her. But at the beginning of her last debate, she was all pumped up at the beginning. Reporter: And Tom, despite the controversy, our new poll shows trump supporters are sticking with him, but their enthusiasm is waning, down 12

This transcript has been automatically generated and may not be 100% accurate.

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